Formerly divided into Stages 3 and 4, N3 is now defined as sleep where account for more than 20% of the epoch. It is extremely difficult to wake an individual from N3; if woken, they will be groggy and disoriented (sleep inertia). This stage is predominant in the first half of the night and is associated with restorative functions, such as tissue repair, growth hormone release, and glymphatic clearance of metabolic waste from the brain.
EEG is a core component of polysomnography, the gold-standard sleep study. The American Academy of Sleep Medicine (AASM) has established standardized methods for scoring sleep stages, arousals, and other events. eeg and sleep physiology ppt
– Overview of ARAS vs. VLPO, the role of GABA and Orexin. Formerly divided into Stages 3 and 4, N3
Records muscle tension, typically from the chin. EKG (Electrocardiogram): Monitors heart rate and rhythm. Respiratory Sensors: Track airflow and blood oxygen levels. 2. Understanding EEG Waveforms EEG is a core component of polysomnography, the
Present during relaxed, closed-eye wakefulness.
